MESON Chess Problem Database

Problem Display
PID: 61364 (2R5/rQ6/5P2/1p1p4/2q1PK2/pR2BB2/P1k5/1N6 w - - 0 1)

Ellerman, Arnoldo

L'Echiquier, 0000

2R5/rQ6/5P2/1p1p4/2q1PK2/pR2BB2/P1k5/1N6

#2

10 + 6

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Rcxc3#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qc6
      • 2.Rxc6#
      • 2.Qxc6#
    • 1...Qc7+
      • 2.Rxc7#
    • 1...Rxb7
      • 2.Sxa3#
    • 1...dxe4
      • 2.Qxe4#
  • Tries
    • 1.Rxc4+?
      • 1...bxc4
        • 2.Rc3#
      • 1...dxc4!
    • 1.Qxd5?
      • threat
        • 2.Bd1#
        • 2.Qd1#
        • 2.Qd2#
        • 2.Qd3#
      • 1...Qc3
        • 2.Bd1#
        • 2.Rcxc3#
        • 2.Qd1#
        • 2.Qd2#
      • 1...Rc7
        • 2.Sxa3#
        • 2.Bd1#
        • 2.Qd1#
        • 2.Qd2#
      • 1...Rd7
        • 2.Sxa3#
        • 2.Bd1#
      • 1...Qc7+!
    • 1.Qxa7?
      • threat
        • 2.Sxa3#
      • 1...Qc7+
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Qc3
        • 2.Rcxc3#
      • 1...b4!
    • 1.Qg7?
      • threat
        • 2.Qg2#
      • 1...Rxg7
        • 2.Sxa3#
      • 1...Qc3
        • 2.Rcxc3#
      • 1...Rc7
        • 2.Sxa3#
      • 1...Qc7+!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qh2#
      • 1...Qc7+
        • 2.e5#
      • 1...Rxh7
        • 2.Sxa3#
      • 1...Qc3
        • 2.Rcxc3#
      • 1...Rc7
        • 2.Sxa3#
      • 1...Rg7
        • 2.Sxa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_PINP(F),OGATE::R1(J),XQ(c)
    • Q(c);N_PINP(F),OGATEB::R(J),XQ(c)
    • Q(c);CHECK,N_PINP(F),OGATEB::R(J),XQ(c)
    • R(f);N_GUARD,XQ(I)::S(A),XP(b)
    • P(e);OGATE,XP(F)::QAB(I),XP(e)
  • Tries
    • Try
      • R(J);CHECK,N_SPINP(F),XQ(c)
      • Vars
        • P(d);XR(J)::R1(C)
      • Refutation
        • P(e);XR(J)
    • Try
      • Q(I);XP(e)
      • Threat
        • DUALS(4)
      • Refutation
        • Q(c);CHECK,N_PINP(F)
    • Try
      • Q(I);XR(f)
      • Threat
        • S(A),XP(b)
      • Vars
        • Q(c);N_PINP(F),OGATE::R1(J),XQ(c)
      • Refutation
        • P(d);
    • Try
      • Q(I);
      • Threat
        • QAR(I)
      • Vars
        • R(f);N_GUARD,XQ(I)::S(A),XP(b)
        • Q(c);N_PINP(F),OGATE::R1(J),XQ(c)
        • R(f);N_GUARD,N_SPINQ(c)::S(A),XP(b)
      • Refutation
        • Q(c);CHECK,N_PINP(F)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • Q(c);CHECK,N_PINP(F)::QAB(I)+P(F)
      • R(f);N_GUARD,XQ(I)::S(A),XP(b)
      • Q(c);N_PINP(F),OGATE::R1(J),XQ(c)
      • R(f);N_GUARD,N_SPINQ(c)::S(A),XP(b)
      • R(f);N_GUARD::S(A),XP(b)
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